Question:I've seen alot of projects for IR remote controls.they use many differnt PICs depending on the number of inputs needed. ( some use the PIC12F629 others might use the PIC16F628 )

But all of them seem to have power applied to the chip at all times.I haven't done the math for the power consumption for the chips,but wouldn't this limit the battery life of the device??

Would it not be better to use double pole switches, one tied to the power of the chipand one tied to the input pin.. so when the users presses the button it powers up the chipand also triggers the input.

Perhaps the power consumption of the chips is not really that much to worry about it.It seems all consumer remotes work on the same way, having the controller chip powered at all times.

Any thoughts on this?Are they any programming "tricks" to help conserver power?

Most remotes work on only use power when key is pressed, so they are in sleep mode most of the time.this is in uA's so drain is less than shelf life of the battery in the unit, unless it's in the hands of my wife

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IR remote control unit wake up from sleep mode by interruption on change a state of microcontroller's input. After sending IR signal it goes sleeping again/It is very important to program all fuses of MCU to reduce current consumption.